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annotate libmlk-core/mlk/core/font.c @ 547:c7664b679a95

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misc: remove error codes for now
author David Demelier <markand@malikania.fr>
date Mon, 06 Mar 2023 20:03:00 +0100
parents 338a4436e255
children 6271599928d4
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1 /*
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2 * font.c -- basic font management
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3 *
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4 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <string.h>
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21
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22 #include <SDL_ttf.h>
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23
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24 #include "color.h"
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25 #include "err.h"
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26 #include "font.h"
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27 #include "texture_p.h"
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28 #include "util.h"
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30 int
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31 mlk_font_open(struct mlk_font *font, const char *path, unsigned int size)
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32 {
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33 assert(font);
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34 assert(path);
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35
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36 if (!(font->handle = TTF_OpenFont(path, size)))
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37 return mlk_errf("%s", SDL_GetError());
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39 return 0;
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40 }
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42 int
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43 mlk_font_openmem(struct mlk_font *font,
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44 const void *buffer,
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45 size_t buflen,
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46 unsigned int size)
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47 {
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48 assert(font);
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49 assert(buffer);
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50
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51 SDL_RWops *ops;
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52
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53 if (!(ops = SDL_RWFromConstMem(buffer, buflen)) ||
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54 (!(font->handle = TTF_OpenFontRW(ops, 1, size))))
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55 return mlk_errf("%s", SDL_GetError());
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57 return 0;
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58 }
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59
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60 int
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61 mlk_font_ok(const struct mlk_font *font)
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62 {
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63 return font && font->handle;
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64 }
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66 int
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67 mlk_font_render(struct mlk_font *font, struct mlk_texture *tex, const char *text, unsigned long color)
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68 {
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69 assert(mlk_font_ok(font));
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70 assert(text);
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71
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72 SDL_Color fg = {
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73 .r = MLK_COLOR_R(color),
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74 .g = MLK_COLOR_G(color),
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75 .b = MLK_COLOR_B(color),
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76 .a = MLK_COLOR_A(color)
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77 };
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78 SDL_Surface *surface;
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79 SDL_Surface *(*func)(TTF_Font *, const char *, SDL_Color);
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80
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81 switch (font->style) {
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82 case MLK_FONT_STYLE_ANTIALIASED:
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83 func = TTF_RenderUTF8_Blended;
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84 break;
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85 default:
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86 func = TTF_RenderUTF8_Solid;
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87 break;
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88 }
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89
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90 if (!(surface = func(font->handle, text, fg)))
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91 return mlk_errf("%s", SDL_GetError());
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92
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93 return mlk__texture_from_surface(tex, surface);
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94 }
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95
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96 unsigned int
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97 mlk_font_height(const struct mlk_font *font)
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98 {
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99 assert(mlk_font_ok(font));
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100
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101 return TTF_FontHeight(font->handle);
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102 }
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103
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104 int
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105 mlk_font_query(const struct mlk_font *font, const char *text, unsigned int *w, unsigned int *h)
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106 {
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107 assert(mlk_font_ok(font));
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108 assert(text);
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109
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110 if (w)
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111 *w = 0;
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112 if (h)
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113 *h = 0;
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114
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115 if (TTF_SizeUTF8(font->handle, text, (int *)w, (int *)h) != 0)
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116 return mlk_errf("%s", SDL_GetError());
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117
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118 return 0;
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119 }
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120
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121 void
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122 mlk_font_finish(struct mlk_font *font)
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123 {
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124 assert(font);
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125
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126 if (font->handle) {
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127 TTF_CloseFont(font->handle);
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128 font->handle = NULL;
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129 }
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130 }